Testing apparatus



Jan. 8, 1952 Filed Nov. 28, 1945 L. J. CUNNINGHAM 2,582,011

TESTING APPARATUS 3 Sheets-Sheet l mmvron. LEON/1RD J. CUNNINGHA'M.

n- 1952 L. J. CUNNINGHAM 2,582,011

TESTING APPARATUS Filed Nov. 28, 1945 3 shets sheet 5 LEONA/p I CINVENTOR. D L/. UNN/NGHHM.

Patented Jan. 8, 1952 UNITED, STAT TESTING PARAT S r Leonard JLiCunn ingham," Lincoln, Near, Application November 28, 1945, Serial No. 631,265

I 1 The present invention relates generally, to testing apparatus and ismore particularlyconcerned with apparatus for testing welds. 1

When it-is desired to test the qualifications of welders, it iscustomary to have them weld two piecesof pipe together in endwiserelation and then cut specimens from the welded pipe, across the line ofweld, and then subject such test pieces to tensile stresses, as in ahydraulic tensile testing machine, until the piece fails, either at theweld-or'in' the pipe. The object and general nature of the presentinvention is the provision of a machine particularly adapted to receivesuch a welded pipe and to cut a plurality of specimens or test pieces.usually called coupons or straps, therefrom, such test pieces extendingacross the line of weld.

' A further distinctivefeature of this invention is the provision of amachine in which the speci- 2"o1aims. (01.2952 8) mens may be cuttherein very rapidly. and exped'itiously, and a further feature is theprovision of such a machinein which the -welded pipe, or sample of weldis readilyhandled when removing the weld specimen and also when shiftingthe same when cutting a plurality of specimens therefrom. v

other and'further features and objects of the invention will bemoreapparent to those skilled in the art upon a consideration of theaccompanying, drawings and following specifications,

wherein is disclosed a single exemplary embodiment of the invention,with the understanding, however, that such changes may be made thereinas fall within the scope of the appended claims, without departing fromthe spirit of the invention.

In said drawings:

Figure 1 is a top or plan view of one form of my invention.

Figure 2 is a side view taken along the line 2-2 of Figure 1.

Figure 3 is a view of one of the sample holders, corresponding to a viewthereof taken along the line 3-3 of Figure 5.

Figures 4 is a section taken along the line 4-4 of Figure 1.

Figure 5 is a side view taken along the line 5-5 of Figure 1.

Referring now to the drawings, and particularly to Figures 1, 2 and 5;the main frame of the device is indicated at I and comprises a standmade up of an upper pair of right and left hand legs 3, 3 and 4, 4assembled together in crossed relation as best shown in Figure 2. Thelower ends of the legs 3 are adapted to be received in the sockets 6which are fixed, as by welding, to the, upper ends of a pair of lowerlegs- 5, 5., The sockets 6 are provided with set screws 1 by means ofwhich the two leg sections are rigidly connected together. The otherlegs a are adapted to be received in the sockets 8 fixed, as byfwelding,to} the upperend of lower legs 9, and the sockets carry set screws, 1 l,or the equivalent.- .The two lower legs sectionsi, 5 and-,9, 9 arefastened together by detachable braces 12 secured in place by set screwsor bolts I3. This construction provides a sturdy support, but which may,.however, be .readily disassembled to be placed in asmall-compactpackage for. transport or th6;like. I Reference was madeabove to the fact-that the qualifications of welders may bedetermined byhaving the welder weld. two pieces of pipe together endwise, and thencutting straps or test specimens therefrom, across the weld, and testingthe same in tension. I I

Such a test pipe sample is-shown in dotted lines in Eigure 5andindicated by the reference numeral [6, the two pipesectionsbeingindicated at-il and I8 and the line of weld at {9. Aspeciment' to be out therefrom is indicated at '20. However, it is to beunderstoodthat this specimen is not illustrated'in' the correct positionfor cutting. "For supporting such a'sampl'e, as at 16, I provide aplurality of work-receiving and sup porting pegs2l which preferably arein'the form of? ."screw threaded studs received by nuts 22 welded "orotherwise fastened 'to a plate 23. As best shown at Figure 5, there is aplate 23 at each side of the machine, and each is fastened to the legs 3and 4 by any suitable means, as by hooklike extensions 25 which overhangthe crossed portions of the legs 3 and 4. A greater or lesser number ofstuds or pegs 2| may be used as required or desired.

The relatively large plates 23 add stability, since gravity and frictionalone retain these hooked Work-supporting members in position. Theseplates also serve to maintain the worksupporting pegs 2! in positionsperpendicular to the legs I. It will be noted, however, that thesework-supporting members are free to be tilted to a limited degree,forward or back, that is, in the plane of the plate 23. Thus, one orboth work-support plates may be tilted, when necessary, to firmlysupport an out of round pipe or other odd shaped piece of material fromwhich a weld sample is to be out.

A frame 26 is detachably carried at the upper ends of the legs 3 and 4,being fastened to said frame by means such as the thumb screws 33, andin these brackets a pair of guide rods 34 and 35 are mounted on suitablemembers 36, which may bein the form of lock nuts.

A carriage 3811's movable along theyguide rods 34 and 35, the latterbeing spaced apart a sufiicient distance so that the carriage isconstrained for linear movement only. A relatively heavy bracket 4| isformed on or carried byztheacarriage 38 and receives one end of each ofa pair of transverse guide rods 43 and "44,"the other ends of which arereceivedzin ,a cross ,plate fl which rides on a roller 46 carried on theupper end of a bracket'4l on the end of the frame 26. A secondcarriage'EI is slidably mounted on the guide rods 43 and Meandhassclampmeans 52 r which is adapted to': secure a =cutting torch, which I haveindicated generallyat 53, .to :the carriage 2.01 -head 5l. The cuttingtorch is of conventional construction and, generically, represents anysuitable tool, -or other means, for performing work on -a @workpiece. Ahalf nut 5 5-is carrid'on the carriage. 5 I and meshes with a =rotatabletransverse screw 56 journaled for rotation the vb-rackets M and 45, oneend thereof extending beyond the bracket 4| and having a handle 51, bywhich the screw 7 55 may be rotated to -shift the-carriage '5 l and thetorch '53transversely=- of -the work l6;

The bracket 32 on the frame extension 30 5 carries one end of arotatable screw 51, the

othenendof-which isreceived in atapped-opening in the carriage 38.Theouter end of the screw -6l has-an *operatinghandle fl by means .thema ainst the inner, adjacentsides of the crossed legs, said supportingmeans comprising outwardly extending, hook-like projections engageableover the crossed portions of the legs, an;d;-a;plurality of transverselyarranged, worksupporting studs threadedly and removably mounted 'on 'thesaid plate-like members and extending horizontally inwardly therefrom;

2. In a device of the character described having *a pair of spaced,crossed legs, means for supporting workpieces between the legscomprising plate-like members disposed against the inner surfaces-of thecrossed legs and having hookof which the screw "6| -may-be rotated"toshift 4 the carriage 38 lengthwise-of its "guide rods 34 and 35 andthereby move the carriage *5 l across the frame 26, {as best shown inFigure 1;

' In operation-the weld sample i6 -is hung on the pegs 2 l the:torch53ignitedandpassed back 'and'forth; and across, "by turning thehandles 51and62 to cut specimens from the weld-ed riipese'ctionsflfi.One such specimen is'mdieaten at 2,1 'iniigurei's.

"AlthoughIThave described a specific embodimentor my invention, itiisapparent thatimo'di- 'fications thereof may be madelby 'thosecskilledlike projections extending'outwardly between the legs above the Lcrossed portions "thereof, and a pluralityof transversely aligned studsextending inwardly 'from the said plate-like -members andthreadedlyattaehed thereto.

'LEGNARD CUNNINGHAM.

REFERENCES CITED The 'foll'owingireferences areof recordin the 'fileofth-is patent: r

UN T DsTA'IES PATENTS Number- Name Date 523,343 Habernacker =Ju'ly24,1894 860,883 Polson Uuly '23, 1907 1,441,913 "Darling JanrQ, 19231,696,916- -Kutscheid Jan. "1, =1929 138045271 Palmer May-5, 19312,391,008 Bucko "Dec. "18, 1945 2,431,101 Woods "Nov. 18,1947

FOREIGN BATENILS V 7 Number 1 Country Date 40,703 Australia July 10,1-928

